Later in 1906 Groucho landed a job with Gus Edwards in a production called Boys and Girls. Groucho was featured on a Gus Edwards original,
with lyrics by Ed Madden. The song was called Farewell
Killarney, and you can see a scan of the cover art from the sheet music (note Groucho's photo taken some six or seven years earlier on the cover), along with the lyrics from
this epic, here.